Abstract Love River, the longest river in Kaohsiung City, 12 km in length, originates from Jen-Wu village of Kaohsiung County and goes into Kaohsiung Harbor from the northeast to southwest. Width of the river is increased from 14 m of the upstream to 130 m. Because there were active shipyards and many boats in Kaohsiung Harbor, TBT in paint as biocide to paint the ship will be released into seawater and cause the long-term contamination of organotin. It is possible that Love River may be polluted by the seawater from Kaohsiung Harbor for the intertidal zone of Love River reaches Chih-Ping Bridge. The goal of the present study is to analyze water and sediment of Love River in order to find out whether Love River has been polluted by organotin and, if yes, where the polluted source is. The samples were derivated with the Grignard reagent¡]n-pentylmagnesium bromide¡^and extracted by n-Hexane. Clean samples were concentrated to about 1 ml under a gentle stream of purified nitrogen gas. The final extracts¡]3£gl of each¡^were injected into a gas chromatograph with a flame photometric detector. The results reveal that TBT and DBT were predominant in the whole area of study. The concentration of TBT¡]29-360 ppt¡^was higher than DBT¡]0-292 ppt¡^in the riverwater. In the sediment, the concentration of DBT( 154-68800 ppb ) was higher than TBT ( 3650-30222 ppb )¡C Gransize between 0.053¢Pto 1.00¢P was predominant in the extent of sorption of organotin to sediments. The percentage of this gransize was from 82¢H to 98¢H. The major source of organotin pollution was Kaohsiung Harbor, but there were some other sources upstream of Chih-Ping Bridge. The polluted source of phentyltin was from the upstream of Chih-Ping Bridge and the branch of Love River¡]Canal, No2¡^. Comparing to other countries, organotin pollution was more serious in Love River. The concentration of TBT exceeded maximum allowable level of 20 ppt in accordance with regulations set by Britain. It is necessary to strengthen the regulation of organotin in Taiwan.

Estuary is an area with very complicated characteristics, which is mainly affected by tidal dynamics. The salinity of a tidal river is influenced by tidal characteristics where fresh water meets salty water and thus causing the complexity. The Love River in Kaohsiung, Taiwan, has been chosen as an study area for the researches describing in this thesis work. The four sampling stations cover the tidal zone of the Love River. Through frequent sampling, which corresponds to spring tides, neap tides and even during complete tidal cycles, the water quality and the variations of particle circulation in estuary area can be comprehended better. The distributions of the nutrients in the river are different during spring tides and neap tides. Nitrite and nitrate are mainly come from the upriver or generated by the nitrification within the river. In addition, the results from the whole tidal cycle experiments show that high flow rate occurs at the bottom during the period of turning tides, which caused higher SPM concentrations in the bottom layer. This is mainly due to the accumulated agitations at the river bottom were resuspended by the strong currents. Analytical results from a Pearson product-moment correlation has shown that the SPM concentrations in the bottom water partly come from the resuspension processes of bottom sediments. Nutrients accumulated in the bottom sediments were released into the water column by the SPM resuspensions. The result of PCA shows that the changes of tides affect the distribution of salinity has a strong negative correlation with turbidity and SPM. It also shows that tides not only have a quite obvious influence on suspended particle matters but also dominate the distribution of suspended particle matters through out the Love River.

Love River, 12 km in length from inland to the sea, is the longest river in Kaohsiung. Love River passes through the harbor of Kaohsiung and connects with the sea bring hidden ecological crises. Because there are persistent shipping from the whole world, several shipyards and fishing ports in the harbor of Kaohsiung, the pollution of organotin is very serious in the harbor area. It¡¦s possible that Love River may be polluted by the seawater from the harbor of Kaohsiung for the long intertidal zone and the estuary, in the harbor of Kaohsiung. Upstream sections may be also polluted by organotin compounds from domestic, industrial and agricultural wastewater. This study is not only collecting the surface and bottom riverwater during winter and summer, but also sampling the sediments in Love River. These samples are derivated with NaBEt4 and analyzed the concentration of organotin by gas chromatograph with a flame photometric detector. The results reveal that concentrations of MBT are 8.2-25.0 ng/L as tin, DBT are 3.3-17.1 ng/L as tin, TBT are 4.3-9.1 ng/L as tin in the riverwater. The concentrations of MBT are 12.5-69.2 ng/g as tin, DBT are 7.1-31.2 ng/g as tin, TBT are 15.8-22.6 ng/g as tin in the surface sediments. The pollution of organotin decrease from the harbor of Kaohsiung to the water gate in the downstream. A peak of pollution is found near the Yu-Cheng bridge in the upstream. The concentrations of the vertical distribution of sediments, MBT are as high as 61.2-273.2 ng/g as tin, DBT are 22.8-256.2 ng/g as tin, TBT are 8.6-168.4 ng/g as tin, it indicates that Love River was polluted extremely seriously by organotin compounds in the past. However, phenyltin compounds were not detected in these samples. As compared with previous reports, today the pollution of organotin compounds has been greatly reduced in Lover River. But it remains to be cared in order to reduce the potential ecological crises which are brought by the pollution.

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To enhance the living quality and tourism, Taiwan government encourages countries and cities to held more colorful activities of local festivals, which can draw a big crowd of foreign sightseers and prosper local economy. Taiwan is abundant in folk cultures; therefore, most local governments is actively promoting some place marketing programs rich in local characteristics, such as ¡§Love River Lantern Festival¡¨, ¡§Tungkong Tuna Cultural Festival¡¨, ¡§Machu Cultural Festival¡¨, ¡§The Yenshui Fireworks Festival¡¨, and ¡§Chamomile Blooming Season¡¨. The above cultural activities are well known not only islandwide but also worldwide. For the past few years, Kaohsiung City government has been deliberately shaping the city with ¡§water¡¨ and ¡§light¡¨. Love River is generally acknowledged as the most representative symbol of Kaohsiung. Nowadays, Kaohsiung has become one of the most beautiful cities in Taiwan and Love River should take most of the credits. Besides, this successful city marketing experience of Kaohsiung now is the legend in Taiwan. This study is based on two theories¡Ð¡§Place Marketing Theory¡¨ and ¡§City Image Theory¡¨. By reviewing lots of literature, summarize some factors, criteria, and alternatives that may be related to Love River environmental image. Then, through in-person expert interviews and questionnaire survey, apply AHP (Analytic Hierarchy Process) to sort out the priorities of the factors, the criteria, and the alternatives. The outcomes are as follows: 1.The priorities of the three factors on the second layer are¡Ð¡§Specific Architecture Clusters¡¨ goes first, ¡§Blue & Green Belt System¡¨ second, and ¡§ Traditional Cultural Festivals¡¨ last. 2.The priorities of the twelve criteria on the third layer are¡Ð ¡§River-Bank Facilities¡¨ goes first, ¡§Culture Heritage And Historic Sites¡¨ second, ¡§Riverfront Parks¡¨ third, ¡§River Channels¡¨ fourth, and ¡§Bridges¡¨ fifth. 3.The priorities of the three alternatives on the fourth layer are¡Ð ¡§The symbol of Kaohsiung Area¡¨ goes first, ¡§Promotion Of Local Tourism and Food & Drink Industry ¡¨ second, ¡§Love River Carnival¡¨ last.

Kaohsiung Harbor is the largest international sea port in Taiwan, a lot of ships around the world pass in and out frequently, the pollution of organotin is very serious in the harbor area. Love River and Chien-Chen River may be polluted by the seawater tidal action from the Kaohsiung harbor. Domestic, industrial and agricultural wastewaters discharged into the upstream sections may also cause the pollution of organotin. The purposes of this study were to understand sources of organotin pollution by analying the content of organotin compounds and to monitor the organotin pollution of the rivers in Kaohsiung. Samples including surface sediments and riverwaters were collected from nineteen stations of Love River and Chien-Chen River. The results revealed that concentrations of MBT, DBT and TBT in the riverwaters of Love River varied between 13.4-43.6, 2.6-9.9 and ND-13.5 ng/L as tin. The concentrations of MBT, DBT and TBT in the riverwaters of Chien-Chen River were 3.1-28.1, 2.1-10.9 and ND-9.1 ng/L as tin, respectively. The concentrations of MBT, DBT and TBT in the surface sediments of Love River varied between 20.6-92.3, 7.6-26.2 and ND-15.4 ng/g as tin. The concentrations of MBT, DBT and TBT in the surface sediments of Chien-Chen River were in the range of 22.4-70.0, 6.4-14.1, ND-31.9 ng/g as tin, respectively. MBT and DBT were detected in all the samples of all the sampling stations of Love River and Chien-Chen River. Distribution of organotin compounds in riverwaters and surface sediments showed a consistency between these two rivers. No phenyltin pollution was detected at all stations, probably due to the decline in agricultural activities and the ban on utilizing triphenyltin acetate as pesticide. Except the highest organotin pollution appeared in the outfall of Love River and Chien-Chen River, other high values of pollution were found near the upper reaches of both rivers.

Turning back to look Kaohsiung city¡¦s development and history of exploitation, both of them had a close relationship with the Love River and Chianjen River. Along the rivers, there are numerous industrial estates and large population. The basin of the rivers is important in politics and economy to Kaohsiung. However, the development of Kaohsiung also causes organic pollution, such as polycyclic aromatic hydrocarbon (PAHs), released to water system. Furthermore, some of these pollutants are carcinogenic, so that this topic is quite important. This study investigates PAHs concentrations and seasonal variations in sediments and suspended solids of these two rivers. Total PAHs concentrations varied from 110 to 4300(ng g-1 dry wt) in sediments and 1500 to 7000(ng g-1 dry wt) in suspended solids of the Love River. Total PAHs concentrations of sediments and suspended solids of the Chianjen River exhibited in the range of 230-3900 (ng g-1 dry wt) and 490-9200 (ng g-1 dry wt), respectively. The average PAHs concentration during rain/ dry season of the Chianjen River is significantly higher than those of the Love River. Compared with global data in literature, level of total PAHs concentrations in sediments and suspended solids of the Love River and Chianjen River belongs to moderate pollution. Total PAHs and total organic carbon (TOC) is significantly related except suspended solids of the Chianjen River. However, the relationship between total PAHs concentrations and mean particle size is not significant because of inequilibrium resulted from different sources. Referring to Sediment quality guidelines (SQGs), most of stations are in safe range, only total PAHs concentrations at station L8 in rainy season is significantly higher than the standard ERL value. For each individual compound, the concentrations of many low-molecular-weight PAHs are higher than their standard ERL¡BLET and LAET values. The result of HCA shows that in both dry and rain season, these two rivers¡¦ sediments and suspended solids are separated into upstream and downstream groups. It is believed that the existence of an intercept device set up in midstream of both rivers is the reason. The PAHs in sediments of the Love River is mainly contributed from automobile exhaustion, while suspended solids in the Love River is mainly contributed from petrogenic source. However, both sediments and suspended solids in the Chianjen River are mainly contributed from combustion pollution.

A LC-MS/MS method for the analysis of alkylphenol polyethoxylates in environmental waters was developed in this study. Preatment procedures including liquid-liquid extraction and solid phase extraction were compared, it¡¦s concluded that solid phase extraction is the more suitable way due to higher recovery and better stability for the analytical results. The recovery of nonylphenol polyethoxylate and octylphenol polyethoxylate were 62.3-110.7 % and 64.9-112.0 %, limit of detection were 17.60-174.9 ng/L and 7.40-53.56 ng/L. Enviromental water samples were collected from eight sampling sites along Love River in Kaohsiung City to investigate the contents of alkylphenol polyethoxylates. The highest concentration of total alkylphenol polyethoxylates was observed at Ming-Cheng Bridge which located at the upstream of Love River. For all of the analyzed compounds, the concentration of octylphenol tetraethoxylate (40.46 £gg/L) was the highest in all of the sampling sites. It¡¦s also noticed the concentration of octylphenol polyethoxylate (20.11 £gg/L) was higher than that of nonylphenol polyehtoxylate (128.04 £gg/L).

Dissolved oxygen (DO) level is a critical factor for the survival of fishes and sustainable management of an aquatic ecosystem. This study aims to investigate the lethal thresholds of three major fish species in the Love River, Kaohsiung, S. W. Taiwan, in an attempt to provide ecological points of view for the further improvement of the river-water quality, as well as for the restoration of its fish community. Laboratory tolerance experiments of fish fries, including mullet (Liza macrolepis), milkfish (Chanos chanos) and tilapia (Oreochromis mossambicus), exposed to low levels of dissolved oxygen were conducted in the period of January 2002 to April 2003. At water temperature of 23¢J, median lethal times (LT50) and 48 hours median lethal concentrations (48h LC50) at the salinity of 10‰, 20‰ and 30‰ were determined, respectively. We also carried out a lethal DO experiment to mullet fry in a sudden drop of salinity from 30‰ to 20‰, which is always the case when the sewage gate of the Love River interception system is opened to avoid flooding after heavy rainfall. Under the condition of 20‰ salinity, the tolerance of low dissolved oxygen for the three species of fish fries were significantly different. Among them, milkfish was found to be the most sensitive species, followed by mullet, whereas tilapia was the most tolerant species. The 48h LC50s of milkfish, mullet and tilapia were 15.7, 8.6 and 7.8% air saturation, respectively, which were 1.16, 0.63 and 0.57 mg/l at 23¢J. Similarly, the LT50s also showed species-specific differences. At DO level of 0.52 mg/l, the LT50s were 77.9 minutes for milkfish, 245.7 minutes for mullet and over 1000 minutes for tilapia. The changing of salinity affecting the tolerance of low dissolved oxygen in fish fries was species depending. The DO lethal concentrations of mullet fry increased with the decrease of salinity, but not the case for milkfish fries. The 48h LC50 of mullet fries in 30‰ saline water was 11.5% air saturation (0.8 mg/l), which was higher than those in 10‰ and 20‰ saline water. However, no significant difference in 48h LC50 was found between milkfish kept in 10‰ and 20‰ saline water. The 48h LC50 for the former was 14.9% air saturation while the latter was 15.7%. Both are equivalent to 1.16 mg/l at water temperature of 23¢J. A rapid change of salinity reduced the low Do tolerance of fish fry. When mullet fry were introduced to 20‰ saline water from acclimated salinity of 30‰, its 48h LC50 raised significantly (13.9% air saturation; 1.02 mg/l). Under the DO concentration of 0.52 mg/l, the LT50 also dropped to 7.6 minute. It means that the opening of sewage interception gate largely challenges the survival fish fry. Based on the results of current study, the DO level of Love River is suggested to be maintained beyond 2.19 mg/l (28 % air saturation, 48h LC50 of milkfish at 10‰ salinity and 23¢J water temperature), in order to achieve a sustainable environment for the present fish community. In case of that DO occasionally fall to the above level, it is strongly recommended that a manual aeration system should be operated within 100 minutes.

The objective of this study was to investigate the spatial and temporal distribution of black carbon (BC) and possible sources by analyzing BC contents in core and sediment trap samples collected from Kao-ping submarine Canyon and surficial sediments collected from Love River, Chianjen River, Kaohsiung Harbor, Kao-ping River and adjacent coastal area. In addition, sediment core and trap samples of Kao-ping submarine Canyon, and suspended solids of Kao-ping estuary were analyzed to estimate the BC loading from Kao-ping River and the flux in Kao-ping submarine Canyon. The concentrations of BC ranged from 0.38 to 3.29 mg g-1 in this study. The results we found in coastal sediments were comparable to those in Asia, but lower than those in America and Europe. Black carbon found in surficial sediments of D2, L1 and of stations from Love River, Chianjen River and Kaohsiung Harbor were contributed from vehicle emission or coal combustion. Correlation coefficients of BC versus total polycyclic aromatic hydrocarbon (PAH) concentrations, combustion PAHs, total organic carbon (TOC) and grain size were significant in the sediments of Kao-ping River adjacent coast. Regrading to the temporal distribution of BC in Kao-ping submarine Canyon, BC and PAHs increased in the deposited sediment after 1970, that was probably related to prosperous industrial activities for last decades in Taiwan. Surficial sediments could be grouped into three clusters by hierarchical cluster analysis (HCA). Results of principal component analysis (PCA) showed principal component 1 (PC 1) could explain 35 % of total variances. Significant PC 1 compound loadings were found mostly from high molecular weight PAHs which derived mainly from combustion processes. This result was supported by the significant correlation (p<0.05) of PC 1 scores versus BC concentrations which were also mainly derived from combustion. BC fluxes for sediment cores, S1 and S37, and sediment trap of Kao-ping submarine Canyon, 0.59 g m-2 yr-1, 2.03 g m-2 yr-1 and 23 g m-2 yr-1, respectively, were comparable to those reported for surficial sediments in literature. However, BC fluxes in this study were lower than those in the sediments from Mouth of Providence River, Palos Verdes Shelf and New England Harbors, but higher than those in pelagic sediments of the Pacific Ocean. In addition, we also measured BC concentrations in suspended solid samples to estimate loadings of Kao-ping estuary which ranged from 33 to 1765 kg day-1 with an average of 602 kg day-1. Annual BC loading of Kao-ping River was roughly estimated as 29.55¡Ñ104 tons which was lower than that of the Mississippi River.